56665279 has 8 divisors (see below), whose sum is σ = 62830800. Its totient is φ = 50668800.

The previous prime is 56665253. The next prime is 56665289. The reversal of 56665279 is 97256665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56665279 - 2⁵ = 56665247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41554 + ... + 42895.

It is an arithmetic number, because the mean of its divisors is an integer number (7853850).

Almost surely, 2^56665279 is an apocalyptic number.

56665279 is a deficient number, since it is larger than the sum of its proper divisors (6165521).

56665279 is a wasteful number, since it uses less digits than its factorization.

56665279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84521.

The product of its digits is 680400, while the sum is 46.

The square root of 56665279 is about 7527.6343561573. The cubic root of 56665279 is about 384.0953155137.

The spelling of 56665279 in words is "fifty-six million, six hundred sixty-five thousand, two hundred seventy-nine".